一种改进的超宽带平面巴伦

doi:10.7523/j.issn.2095-6134.2010.4.011

中国科学院大学学报 ›› 2010, Vol. 27 ›› Issue (4): 507-511.DOI: 10.7523/j.issn.2095-6134.2010.4.011

一种改进的超宽带平面巴伦

吴秉横^1,2, 纪奕才¹, 方广有¹

1. 中国科学院电子学研究所,北京 100190;;
2. 中国科学院研究生院,北京 100049

收稿日期:2009-01-21 修回日期:2010-02-26 发布日期:2010-07-15
通讯作者: 吴秉横
基金资助:
国家高技术研究发展计划(863计划)(2008AA10Z205)资助 

Design and improvement of a novel wideband planar balun

WU Bing-Heng^1,2, JI Yi-Cai¹, FANG Guang-You¹

1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2. Graduate University, Chinese Academy of Sciences, Beijing 100049, China

Received:2009-01-21 Revised:2010-02-26 Published:2010-07-15

摘要/Abstract

摘要：

设计了一种改进的基于共面波导和带状线传输的超宽带平面巴伦.采用低介电常数材料作为介质基板,引入一段切比雪夫多节阻抗变换器,并改进了使共面波导两地等势的方式.这些措施有效地增加了工作带宽,降低了介质损耗.设计并制作了一种50Ω非平衡到100Ω平衡馈电转换的超宽带平面巴伦,在0.1~3GHz的频率范围内,测试得到的插入损耗小于1.5dB,输出端接匹配负载时电压驻波比小于2,实验结果和仿真结果吻合良好.

关键词: 巴伦, 超宽带, 共面波导, 带状线

Abstract:

An ultra wideband (UWB) planar balun (balanced to unbalanced transformer) is designed based on Coplanar Waveguide (CPW) and coplanar strip (CPS). The proposed balun is fabricated on a substrate with low dielectric constant. For this balun, one Chebyshev impedance transform section is inserted and the structure making the two grounds of CPW electrically equal is improved. By means of these methods, the operation bandwidth of the proposed balun is expanded, and the insertion loss becomes lower. An UWB planar balun, which can transform a 50Ω unbalanced input to the 100Ω balanced output, is designed and fabricated. The measured results indicate that the insertion loss of the balun is lower than 1.5 dB and the VSWR is lower than 2 when the match load is connected with output in the frequency range from 0.1 to 3GHz. The simulation and measurement results are in good agreement.

Key words: balun, ultra wideband (UWB), coplanar waveguide (CPW), coplanar strip (CPS)

中图分类号:

TN957

吴秉横, 纪奕才, 方广有. 一种改进的超宽带平面巴伦[J]. 中国科学院大学学报, 2010, 27(4): 507-511.

WU Bing-Heng, JI Yi-Cai, FANG Guang-You. Design and improvement of a novel wideband planar balun[J]. , 2010, 27(4): 507-511.

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一种改进的超宽带平面巴伦

Design and improvement of a novel wideband planar balun

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